42.—(1) Not less than 56 days before the commencement of any specified works the undertaker must submit to National Grid a plan of the works to be executed and seek from National Grid details of the underground extent of their electricity tower foundations.
(2) In relation to works which will or may be situated on, over, under or within 15 metres measured in any direction of any apparatus; or involve embankment works within 15 metres of any apparatus, the plan to be submitted to National Grid under sub-paragraph (1) must include a method statement and describe—
(a)the exact position of the works;
(b)the level at which these are proposed to be constructed or renewed;
(c)the manner of their construction or renewal including details of excavation, positioning of plant;
(d)the position of all apparatus;
(e)by way of detailed drawings, every alteration proposed to be made to or close to any such apparatus;
(f)any intended maintenance regimes; and
(g)an assessment of risks of rise of earth issues.
(3) In relation to any works which will or may be situated on, over, under or within 10 metres of any part of the foundations of an electricity tower or between any two or more electricity towers, the plan to be submitted under sub-paragraph (1) must, in addition to the matters set out in sub-paragraph (2), include a method statement describing—
(a)details of any cable trench design including route, dimensions and clearance to pylon foundations;
(b)demonstration that pylon foundations will not be affected prior to, during and post construction;
(c)details of load bearing capacities of trenches;
(d)details of any cable installation methodology including access arrangements, jointing bays and backfill methodology;
(e)a written management plan for high voltage hazard during construction and ongoing maintenance of any cable route;
(f)written details of the operations and maintenance regime for any cable, including frequency and method of access;
(g)assessment of earth rise potential if reasonably required by National Grid’s engineers; and
(h)evidence that trench bearing capacity is to be designed to support overhead line construction traffic of up to 26 tonnes in weight.
(4) The undertaker must not commence any works to which sub-paragraphs (2) or (3) apply until National Grid has given written approval of the plan so submitted.
(5) Any approval of National Grid required under sub-paragraphs (4)—
(a)may be given subject to reasonable conditions for any purpose mentioned in sub-paragraphs (6) or (8); and
(b)must not be unreasonably withheld.
(6) In relation to any work to which sub-paragraphs (2) or (3) apply, National Grid may require such modifications to be made to the plans as may be reasonably necessary for the purpose of securing its apparatus against interference or risk of damage, for the provision of protective works or for the purpose of providing or securing proper and convenient means of access to any apparatus.
(7) Works executed under sub-paragraphs (2) or (3) must be executed in accordance with the plan submitted under sub-paragraph (1) or, as relevant, sub-paragraph (6), as approved or as amended from time to time by agreement between the undertaker and National Grid and in accordance with such reasonable requirements as may be made in accordance with sub-paragraphs (6) or (8) by National Grid for the alteration or otherwise for the protection of the apparatus, or for securing access to it, and National Grid will be entitled to watch and inspect the execution of those works.
(8) Where under sub-paragraph (6) National Grid requires any protective works to be carried out by itself or by the undertaker (whether of a temporary or permanent nature) such protective works, inclusive of any measures or schemes required and approved as part of the plan approved pursuant to this paragraph, must be carried out to National Grid’s satisfaction prior to the commencement of any specified works for which protective works are required and National Grid must give notice of its requirement for such works within 42 days of the date of submission of a plan pursuant to this paragraph (except in an emergency).
(9) If National Grid in accordance with sub-paragraphs (6) or (8) and in consequence of the works proposed by the undertaker, reasonably requires the removal of any apparatus and gives written notice to the undertaker of that requirement, paragraphs 34 to 36 and 39 to 41 apply as if the removal of the apparatus had been required by the undertaker under paragraph 40(2) (removal of apparatus).
(10) Nothing in this paragraph precludes the undertaker from submitting at any time or from time to time, but in no case less than 56 days before commencing the execution of the specified works, a new plan, instead of the plan previously submitted, and having done so the provisions of this paragraph apply to and in respect of the new plan.
(11) The undertaker will not be required to comply with sub-paragraph (1) where it needs to carry out emergency works but in that case it must give to National Grid notice as soon as is reasonably practicable and a plan of those works and must comply with sub-paragraphs (6), (7) and (8) insofar as is reasonably practicable in the circumstances.
(12) In sub-paragraph (11) “emergency works” means works whose execution at the time when they are executed is required in order to put an end to or to prevent the occurrence of circumstances then existing or imminent (or which the person responsible for the works believes on reasonable grounds to be existing or imminent) which are likely to cause danger to persons or property.